Effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis

Abstract

The focus of the study is on the effect of copper addition on the porosity, microstructure and mechanical properties of hot pressed NiTi and NiTiCu shape memory alloys (SMAs), ignited by means of self-propagating high-temperature synthesis (SHS). Optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrometry (EDS), hardness tests and compression tests were applied respectively to determine the microstructure and mechanical behavior of the samples. The experimental results show that the addition of Cu into NiTi SMAs increases porosity and microhardness but also reduces compressive strength.

Effect of Wc Reinforced on Microstructure and Mechanical Properties of Cualmn Alloys Produced by Hot Pressing Method

“…Demand increases for copper (Cu) based alloys, especially Cu-Al-Ni, CuZn-Al and Cu-Al-Mn alloys due to their cheap cost and good shape recall effects and superelasticity in engineering applications [22][23][24]. Cu-based shape recall alloys have been in great demand after the 1960s and have been used as alternatives to NiTi alloys, because they have good electrical and thermal conductivity [25,26]. Cu based shape remembering alloy systems are in great demand in the practical applications of shape remembering alloys.…”

Toz metalurjisi ile Üretilen NiTi Alaşımına Al'un Etkisi

“…Toz metalürjisi ile üretilen NiTi numunelerinin mikroyapılarında austenit NiTi, martensit NiTi ve NiTi2 fazlarının oluştuğu birçok araştırmacı tarafından belirtilmektedir [31,[38][39][40]. SHS yönteminde üretilen NiTi malzemede NiTi2 fazın varlığı kaçınılmaz olmasının temel sebebi bu fazın tercihen oluşmasıyla ilgilidir [41].…”

Study on the Mechanical Properties of Ni-Ti-Cu Shape Memory Alloy Considering Different Cu Contents

“…Hakan et al have studied the effect of Cu addition on microstructure and mechanical properties of Ni-based SMA [17]. Musa et al have studied the effect of Cu addition on porous NiTi SMAs produced by self-propagating high-temperature synthesis [18]. Shelyakov et al have studied the formation of structure of Ti-Ni-Cu alloys with high copper contents planar flow casting [19].…”